content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import static org.junit.Assert.*;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.util.*;
  import java.util.concurrent.*;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.junit.Test;
  
  import io.reactivex.common.TestCommonHelper;
  import io.reactivex.common.exceptions.*;
  import io.reactivex.common.functions.Function;
  import io.reactivex.common.internal.functions.Functions;
  import io.reactivex.observable.*;
  import io.reactivex.observable.Observable;
  import io.reactivex.observable.Observer;
  import io.reactivex.observable.observers.*;
  import io.reactivex.observable.subjects.*;
  
  public class ObservableWindowWithObservableTest {
  
      @Test
      public void testWindowViaObservableNormal1() {
          PublishSubject<Integer> source = PublishSubject.create();
          PublishSubject<Integer> boundary = PublishSubject.create();
  
          final Observer<Object> o = TestHelper.mockObserver();
  
          final List<Observer<Object>> values = new ArrayList<Observer<Object>>();
  
          Observer<Observable<Integer>> wo = new DefaultObserver<Observable<Integer>>() {
              @Override
              public void onNext(Observable<Integer> args) {
                  final Observer<Object> mo = TestHelper.mockObserver();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  o.onError(e);
              }
  
              @Override
              public void onComplete() {
                  o.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          int n = 30;
          for (int i = 0; i < n; i++) {
              source.onNext(i);
              if (i % 3 == 2 && i < n - 1) {
                  boundary.onNext(i / 3);
              }
          }
          source.onComplete();
  
  
          verify(o, never()).onError(any(Throwable.class));
  
          assertEquals(n / 3, values.size());
  
          int j = 0;
          for (Observer<Object> mo : values) {
              verify(mo, never()).onError(any(Throwable.class));
              for (int i = 0; i < 3; i++) {
                  verify(mo).onNext(j + i);
              }
              verify(mo).onComplete();
              j += 3;
          }
  
          verify(o).onComplete();
      }
  
      @Test
      public void testWindowViaObservableBoundaryCompletes() {
          PublishSubject<Integer> source = PublishSubject.create();
          PublishSubject<Integer> boundary = PublishSubject.create();
  
          final Observer<Object> o = TestHelper.mockObserver();
  
          final List<Observer<Object>> values = new ArrayList<Observer<Object>>();
  
          Observer<Observable<Integer>> wo = new DefaultObserver<Observable<Integer>>() {
              @Override
              public void onNext(Observable<Integer> args) {
                  final Observer<Object> mo = TestHelper.mockObserver();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  o.onError(e);
              }
  
              @Override
              public void onComplete() {
                  o.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          int n = 30;
          for (int i = 0; i < n; i++) {
              source.onNext(i);
              if (i % 3 == 2 && i < n - 1) {
                  boundary.onNext(i / 3);
              }
          }
          boundary.onComplete();
  
          assertEquals(n / 3, values.size());
  
          int j = 0;
          for (Observer<Object> mo : values) {
              for (int i = 0; i < 3; i++) {
                  verify(mo).onNext(j + i);
              }
              verify(mo).onComplete();
              verify(mo, never()).onError(any(Throwable.class));
              j += 3;
          }
  
          verify(o).onComplete();
          verify(o, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testWindowViaObservableBoundaryThrows() {
          PublishSubject<Integer> source = PublishSubject.create();
          PublishSubject<Integer> boundary = PublishSubject.create();
  
          final Observer<Object> o = TestHelper.mockObserver();
  
          final List<Observer<Object>> values = new ArrayList<Observer<Object>>();
  
          Observer<Observable<Integer>> wo = new DefaultObserver<Observable<Integer>>() {
              @Override
              public void onNext(Observable<Integer> args) {
                  final Observer<Object> mo = TestHelper.mockObserver();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  o.onError(e);
              }
  
              @Override
              public void onComplete() {
                  o.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          source.onNext(0);
          source.onNext(1);
          source.onNext(2);
  
          boundary.onError(new TestException());
  
          assertEquals(1, values.size());
  
          Observer<Object> mo = values.get(0);
  
          verify(mo).onNext(0);
          verify(mo).onNext(1);
          verify(mo).onNext(2);
          verify(mo).onError(any(TestException.class));
  
          verify(o, never()).onComplete();
          verify(o).onError(any(TestException.class));
      }
  
      @Test
      public void testWindowViaObservableSourceThrows() {
          PublishSubject<Integer> source = PublishSubject.create();
          PublishSubject<Integer> boundary = PublishSubject.create();
  
          final Observer<Object> o = TestHelper.mockObserver();
  
          final List<Observer<Object>> values = new ArrayList<Observer<Object>>();
  
          Observer<Observable<Integer>> wo = new DefaultObserver<Observable<Integer>>() {
              @Override
              public void onNext(Observable<Integer> args) {
                  final Observer<Object> mo = TestHelper.mockObserver();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  o.onError(e);
              }
  
              @Override
              public void onComplete() {
                  o.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          source.onNext(0);
          source.onNext(1);
          source.onNext(2);
  
          source.onError(new TestException());
  
          assertEquals(1, values.size());
  
          Observer<Object> mo = values.get(0);
  
          verify(mo).onNext(0);
          verify(mo).onNext(1);
          verify(mo).onNext(2);
          verify(mo).onError(any(TestException.class));
  
          verify(o, never()).onComplete();
          verify(o).onError(any(TestException.class));
      }
  
      @Test
      public void testWindowNoDuplication() {
          final PublishSubject<Integer> source = PublishSubject.create();
          final TestObserver<Integer> tsw = new TestObserver<Integer>() {
              boolean once;
              @Override
              public void onNext(Integer t) {
                  if (!once) {
                      once = true;
                      source.onNext(2);
                  }
                  super.onNext(t);
              }
          };
          TestObserver<Observable<Integer>> ts = new TestObserver<Observable<Integer>>() {
              @Override
              public void onNext(Observable<Integer> t) {
                  t.subscribe(tsw);
                  super.onNext(t);
              }
          };
          source.window(new Callable<Observable<Object>>() {
              @Override
              public Observable<Object> call() {
                  return Observable.never();
              }
          }).subscribe(ts);
  
          source.onNext(1);
          source.onComplete();
  
          ts.assertValueCount(1);
          tsw.assertValues(1, 2);
      }
  
      @Test
      public void testWindowViaObservableNoUnsubscribe() {
          Observable<Integer> source = Observable.range(1, 10);
          Callable<Observable<String>> boundary = new Callable<Observable<String>>() {
              @Override
              public Observable<String> call() {
                  return Observable.empty();
              }
          };
  
          TestObserver<Observable<Integer>> ts = new TestObserver<Observable<Integer>>();
          source.window(boundary).subscribe(ts);
  
          // 2.0.2 - not anymore
          // assertTrue("Not cancelled!", ts.isCancelled());
          ts.assertComplete();
      }
  
      @Test
      public void testBoundaryUnsubscribedOnMainCompletion() {
          PublishSubject<Integer> source = PublishSubject.create();
          final PublishSubject<Integer> boundary = PublishSubject.create();
          Callable<Observable<Integer>> boundaryFunc = new Callable<Observable<Integer>>() {
              @Override
              public Observable<Integer> call() {
                  return boundary;
              }
          };
  
          TestObserver<Observable<Integer>> ts = new TestObserver<Observable<Integer>>();
          source.window(boundaryFunc).subscribe(ts);
  
          assertTrue(source.hasObservers());
          assertTrue(boundary.hasObservers());
  
          source.onComplete();
  
          assertFalse(source.hasObservers());
          assertFalse(boundary.hasObservers());
  
          ts.assertComplete();
          ts.assertNoErrors();
          ts.assertValueCount(1);
      }
      @Test
      public void testMainUnsubscribedOnBoundaryCompletion() {
          PublishSubject<Integer> source = PublishSubject.create();
          final PublishSubject<Integer> boundary = PublishSubject.create();
          Callable<Observable<Integer>> boundaryFunc = new Callable<Observable<Integer>>() {
              @Override
              public Observable<Integer> call() {
                  return boundary;
              }
          };
  
          TestObserver<Observable<Integer>> ts = new TestObserver<Observable<Integer>>();
          source.window(boundaryFunc).subscribe(ts);
  
          assertTrue(source.hasObservers());
          assertTrue(boundary.hasObservers());
  
          boundary.onComplete();
  
          // FIXME source still active because the open window
          assertTrue(source.hasObservers());
          assertFalse(boundary.hasObservers());
  
          ts.assertComplete();
          ts.assertNoErrors();
          ts.assertValueCount(1);
      }
  
      @Test
      public void testChildUnsubscribed() {
          PublishSubject<Integer> source = PublishSubject.create();
          final PublishSubject<Integer> boundary = PublishSubject.create();
          Callable<Observable<Integer>> boundaryFunc = new Callable<Observable<Integer>>() {
              @Override
              public Observable<Integer> call() {
                  return boundary;
              }
          };
  
          TestObserver<Observable<Integer>> ts = new TestObserver<Observable<Integer>>();
          source.window(boundaryFunc).subscribe(ts);
  
          assertTrue(source.hasObservers());
          assertTrue(boundary.hasObservers());
  
          ts.dispose();
  
          // FIXME source has subscribers because the open window
          assertTrue(source.hasObservers());
          // FIXME boundary has subscribers because the open window
          assertTrue(boundary.hasObservers());
  
          ts.assertNotComplete();
          ts.assertNoErrors();
          ts.assertValueCount(1);
      }
  
      @Test
      public void newBoundaryCalledAfterWindowClosed() {
          final AtomicInteger calls = new AtomicInteger();
          PublishSubject<Integer> source = PublishSubject.create();
          final PublishSubject<Integer> boundary = PublishSubject.create();
          Callable<Observable<Integer>> boundaryFunc = new Callable<Observable<Integer>>() {
              @Override
              public Observable<Integer> call() {
                  calls.getAndIncrement();
                  return boundary;
              }
          };
  
          TestObserver<Observable<Integer>> ts = new TestObserver<Observable<Integer>>();
          source.window(boundaryFunc).subscribe(ts);
  
          source.onNext(1);
          boundary.onNext(1);
          assertTrue(boundary.hasObservers());
  
          source.onNext(2);
          boundary.onNext(2);
          assertTrue(boundary.hasObservers());
  
          source.onNext(3);
          boundary.onNext(3);
          assertTrue(boundary.hasObservers());
  
          source.onNext(4);
          source.onComplete();
  
          ts.assertNoErrors();
          ts.assertValueCount(4);
          ts.assertComplete();
  
          assertFalse(source.hasObservers());
          assertFalse(boundary.hasObservers());
      }
  
      @Test
      public void boundaryDispose() {
          TestHelper.checkDisposed(Observable.never().window(Observable.never()));
      }
  
      @Test
      public void boundaryDispose2() {
          TestHelper.checkDisposed(Observable.never().window(Functions.justCallable(Observable.never())));
      }
  
      @Test
      public void boundaryOnError() {
          TestObserver<Object> to = Observable.error(new TestException())
          .window(Observable.never())
          .flatMap(Functions.<Observable<Object>>identity(), true)
          .test()
          .assertFailure(CompositeException.class);
  
          List<Throwable> errors = TestCommonHelper.compositeList(to.errors().get(0));
  
          TestCommonHelper.assertError(errors, 0, TestException.class);
      }
  
      @Test
      public void mainError() {
          Observable.error(new TestException())
          .window(Functions.justCallable(Observable.never()))
          .test()
          .assertError(TestException.class);
      }
  
      @Test
      public void innerBadSource() {
          TestHelper.checkBadSourceObservable(new Function<Observable<Integer>, Object>() {
              @Override
              public Object apply(Observable<Integer> o) throws Exception {
                  return Observable.just(1).window(o).flatMap(new Function<Observable<Integer>, ObservableSource<Integer>>() {
                      @Override
                      public ObservableSource<Integer> apply(Observable<Integer> v) throws Exception {
                          return v;
                      }
                  });
              }
          }, false, 1, 1, (Object[])null);
  
          TestHelper.checkBadSourceObservable(new Function<Observable<Integer>, Object>() {
              @Override
              public Object apply(Observable<Integer> o) throws Exception {
                  return Observable.just(1).window(Functions.justCallable(o)).flatMap(new Function<Observable<Integer>, ObservableSource<Integer>>() {
                      @Override
                      public ObservableSource<Integer> apply(Observable<Integer> v) throws Exception {
                          return v;
                      }
                  });
              }
          }, false, 1, 1, (Object[])null);
      }
  
      @Test
      public void reentrant() {
          final Subject<Integer> ps = PublishSubject.<Integer>create();
  
          TestObserver<Integer> to = new TestObserver<Integer>() {
              @Override
              public void onNext(Integer t) {
                  super.onNext(t);
                  if (t == 1) {
                      ps.onNext(2);
                      ps.onComplete();
                  }
              }
          };
  
          ps.window(BehaviorSubject.createDefault(1))
          .flatMap(new Function<Observable<Integer>, ObservableSource<Integer>>() {
              @Override
              public ObservableSource<Integer> apply(Observable<Integer> v) throws Exception {
                  return v;
              }
          })
          .subscribe(to);
  
          ps.onNext(1);
  
          to
          .awaitDone(1, TimeUnit.SECONDS)
          .assertResult(1, 2);
      }
  
      @Test
      public void reentrantCallable() {
          final Subject<Integer> ps = PublishSubject.<Integer>create();
  
          TestObserver<Integer> to = new TestObserver<Integer>() {
              @Override
              public void onNext(Integer t) {
                  super.onNext(t);
                  if (t == 1) {
                      ps.onNext(2);
                      ps.onComplete();
                  }
              }
          };
  
          ps.window(new Callable<Observable<Integer>>() {
              boolean once;
              @Override
              public Observable<Integer> call() throws Exception {
                  if (!once) {
                      once = true;
                      return BehaviorSubject.createDefault(1);
                  }
                  return Observable.never();
              }
          })
          .flatMap(new Function<Observable<Integer>, ObservableSource<Integer>>() {
              @Override
              public ObservableSource<Integer> apply(Observable<Integer> v) throws Exception {
                  return v;
              }
          })
          .subscribe(to);
  
          ps.onNext(1);
  
          to
          .awaitDone(1, TimeUnit.SECONDS)
          .assertResult(1, 2);
      }
  
      @Test
      public void badSource() {
          TestHelper.checkBadSourceObservable(new Function<Observable<Object>, Object>() {
              @Override
              public Object apply(Observable<Object> o) throws Exception {
                  return o.window(Observable.never()).flatMap(new Function<Observable<Object>, ObservableSource<Object>>() {
                      @Override
                      public ObservableSource<Object> apply(Observable<Object> v) throws Exception {
                          return v;
                      }
                  });
              }
          }, false, 1, 1, 1);
      }
  
      @Test
      public void badSourceCallable() {
          TestHelper.checkBadSourceObservable(new Function<Observable<Object>, Object>() {
              @Override
              public Object apply(Observable<Object> o) throws Exception {
                  return o.window(Functions.justCallable(Observable.never())).flatMap(new Function<Observable<Object>, ObservableSource<Object>>() {
                      @Override
                      public ObservableSource<Object> apply(Observable<Object> v) throws Exception {
                          return v;
                      }
                  });
              }
          }, false, 1, 1, 1);
      }
  }
  